complete the square

What is the first step to solving THIS equation by completing the square?
a² + 10a + 21 = 0

• Set the equation equal to zero
• Divide 10 by 2 and add the result to both sides
• Add a² and 10a together
• Subtract the 21

Tags

CCSS.HSA-REI.B.4B

When factoring
x² - 4x + 4 = 20,
what goes in the blank?
(x - __ )² = 20

• 4
• 2
• 8
• 20

Tags

CCSS.HSA-REI.B.4B

What is one of the solutions to this equation?
(2x - 1)² = 49

• 7
• -7
• -4
• -3

Tags

CCSS.8.EE.A.2

Complete the Square
x² + 6x = 5

• (x + 3)² = 5
• (x + 6)² = 9
• (x + 3)² = 14
• (x + 6)² = 14

Tags

CCSS.HSA-REI.B.4B

Complete the square for

x² + 6x + ____

(find the missing value that goes in the blank)

• 9

• 12

• 36

• - 9

Tags

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

Find the missing value "c" to create a perfect square trinomial:
x² + 26x + ___ 

• 13
• 136
• 169
• 26

Tags

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

What is one of the solutions to this equation?
(2x - 1)² = 49

• 7
• -7
• -4
• -3

Tags

CCSS.8.EE.A.2

Solve the following equation by completing the square:
n² - 2n - 3 = 0

• {3, -1}
• {4, -4}
• {5, -3}
• {8, -7}

Tags

CCSS.HSA-REI.B.4B

Simplify √56

• 4√14
• 2√14
• 2√27
• 4√7

Tags

CCSS.HSN.RN.A.2

Simplify √800.

• 10√8
• 5√32
• 12√2
• 20√2

Tags

CCSS.HSN.RN.A.2